<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>空格示例</title>
</head>
<body>
<select id="s1Id" multiple="multiple">
<option>请选择</option>
<option value="o1" id="id1">   With spaces</option>
<option value="o2" id="id2">abc   With spaces</option>
<option value="o3" id="id3">abc&nbsp;&nbsp;&nbsp;With nbsp</option>
</select>
</body>
</html>